xref: /freebsd-10.1-release/sys/netinet/tcp_lro.h

/*******************************************************************************

Copyright (c) 2006, Myricom Inc.
Copyright (c) 2008, Intel Corporation.
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$FreeBSD: head/sys/netinet/tcp_lro.h 179737 2008-06-11 22:12:50Z jfv $

***************************************************************************/
#ifndef _TCP_LRO_H_
#define _TCP_LRO_H_

struct lro_entry;
struct lro_entry
{
	SLIST_ENTRY(lro_entry) next;
	struct mbuf  	*m_head;
	struct mbuf	*m_tail;
	int		timestamp;
	struct ip	*ip;
	uint32_t	tsval;
	uint32_t	tsecr;
	uint32_t	source_ip;
	uint32_t	dest_ip;
	uint32_t	next_seq;
	uint32_t	ack_seq;
	uint32_t	len;
	uint32_t	data_csum;
	uint16_t	window;
	uint16_t	source_port;
	uint16_t	dest_port;
	uint16_t	append_cnt;
	uint16_t	mss;

};
SLIST_HEAD(lro_head, lro_entry);

struct lro_ctrl {
	struct ifnet	*ifp;
	int		lro_queued;
	int		lro_flushed;
	int		lro_bad_csum;
	int		lro_cnt;

	struct lro_head	lro_active;
	struct lro_head	lro_free;
};


int tcp_lro_init(struct lro_ctrl *);
void tcp_lro_free(struct lro_ctrl *);
void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *);
int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t);

/* Number of LRO entries - these are per rx queue */
#define LRO_ENTRIES			8

#endif /* _TCP_LRO_H_ */